T_SYNCHOFF
ti->flags ^= T_NEGOTIATE | T_SYNCHOFF;
if ((ti->flags & (T_SYNCMODE | T_SYNCHOFF)) ==
T_SYNCHOFF &&
ti->flags ^= T_NEGOTIATE | T_SYNCHOFF;
if ((ti->flags & T_SYNCHOFF) == 0)
0 : T_SYNCHOFF) |
(ti->flags & T_SYNCHOFF) == 0 && sc->sc_minsync != 0) {